The CES 2018 event experienced a blackout Wednesday, putting one of the world’s largest displays of tech and electronic devices at a standstill for nearly two hours.

According to CNBC, an isolated power outage shut down the event at the Las Vegas Convention Center. Event officials said they were still investigating how the power went out.

After about an hour, only the south and north halls in the plaza were without power. Other areas had lights and working electronics. Samsung, Intel, LG and Panasonic were among the tech companies that lost power.

The CES event draws tech companies from all over the world. It hosts close to 170,000 visitors with more than 4,000 display booths, CNBC reported.

“The outage is a bit ironic, given CES’ status as one of the world’s biggest technology conferences,” according to Geek Wire.

But some companies had fun with the outage. Intel poked fun at the situation with its own set of tweets, calling the blackout the best new device of the event.

At Intel’s booth, a woman played the violin to entertain the attendees caught in the dark.